r o g e k s x o o f c hi ca g o



l, To all v'whom/it ma/y concern Be it known that I, Z. ROGERS, ofChicago, in the county of Cook, and State of Illinois, have inventedgiirs e l i IMPROVED AIR-INHALER.

The Schedule referred ton these Letters Patent fand making part of thename.

au ImprovedAir-In'haler; and I do hereby declare that the following isafull, clear, andexact'descrip- Vtion of the construction and operationofthe saine',

`.reference being had tothe accompanying drawings,

and letters of referencermarked thereon, making a partof thisspecification, yin whichvention.- p

- Figure 1 is, a perspective representation of my `in- Figure 2, alongitudinal section of the same.-

Figure 3, va transverse section.

Figur'eli, the -valve-cylinder. `This invention relates more especiallyto an irnprovement in mouth-pieces for air-inhalers, which are c usedto'produce anaesthesia, preparatory to peri`orm`v ingsurgicalopexations, extracting teeth, Ste.,4 and Its nature consistsinthe use of a closely-fitting mouth-piece, inside of which is a tube forconducting the airto the mouth, and a valve for preventing the air onceinhaled, from entering thesupply-tube, and in the side of which is avalve operating in a cylinder, and

` arranged to close-and prevent the atmospheric air from being drawninto the lungs,- andto swing openand l allow` the medicated air toescape.V

To enable others to make and use my invention, ,I have'markedcorresponding parts with similar letters,

and will now give'a detaileddescription.

` -A represents the mouth-piece, which is made of any non-corrosivemetal metal, and to fit the outside ofthe lips closely. y

A cylinder, ,B, is soldered, or otherwise made-fast to the smallerendjof this mouthpiece,.as shown in all of the igures, except`4, and ithas a-'screw-thread cnt on its internal periphery for fastening toaspply-pipe,

, y in the usual manner; and "it has hinged to its inner end, (l, avalve, D, which is arranged to allow a suitable quantity of' air to passinto the lungs, and to close by the outward current of the breath, andthus prei vent the air once breathed from again entering the Asupply-pipe.

A screw-thread is alsocut on that part of the cyli inder B projectinginside of the mouth-piece A, and a rubber' tube Eis turned thereon, saidtube having holes f f in its periphery,.through which the air from themouth is breathed out.

An important feature of my invention consists in `the novel means usedto prevent the escape-valve from being injured when in use, and also to`hold it in place.

A short metal cylinder, 71., with a head at the outer end, and a narrowflange, v rv, at the other, is put Vthrough a.f suitable opening in themouth-piece A, to

support a valve, S, tig. 8, whichfvalve` is hinged or jointedto theperiphery of the cylinder, and shuts againstthesaidangec lv, and thuscloses the opening m, same figure, when air is inhaled through the tubeE, and opens 'when air is exhaled from the lungs;

openings d d, in the under side of the periphery of the cylinder, asshown at g. 4, allowing the air to pass ont of the moith-piece A? and anopening, a, in the head of the cylinder, permitting the atmosphericairto enter and close the valve.

Having vthus described my invention,

What I claim, and desire to secure by Letters Yat- 17.' The cylinder hand valve S, in combination with the mouth-piece A, arranged to operatesubstantially as herein described and shown.

2. The combination of the cylinder h, valve S, mouthpiece A, tube E,valve D, andaoylinder B, the whole being arranged and constructedsubstantially as set forth. y l

Z. ROGERS.

Witnesses:

` G. L. OHAPIN, A. HAYWARD.

